JPH01261993A - Body sensory oscillating device - Google Patents

Abstract

PURPOSE:To efficiently and physically sense acoustic oscillation and to attain the high efficient transmission of a low sound area by providing a high density layer on the other face of an elasticity member whose on face receives the pressing of a human body, making a grooved rigidity into contact with said surface, and forming long space. CONSTITUTION:When an electric signal with music and the like as a content is inputted to an acoustic box 20 having an electroacoustic transducer, the electric signal is transduced into an acoustic signal. Then, an air column in a high density layer 32 of a cushioning material (elasticity member) 24 and long space formed by a channel 10 provided at a supporting part (rigidity) 2 resonates. That is, a sound wave outputted from the box 20 is reflected by the high density layer 32 of the cushioning material 24 whose acoustic impedance is large, and the supporting part 2, and a standing wave is generated at the air column. But, since the acoustic impedance of the high density layer 32 is smaller than the supporting parts 2, the one part of the sound wave transmits through the high density layer 32 and advances in the cushioning material 24. Consequently, the acoustic oscillation is transmitted to a human body comfortably held with the cushioning material.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sensory vibration device that directly transmits acoustic vibrations to a human body.

[Prior Art] A sensory vibration device is disclosed in Japanese Utility Model Application Publication No. 51-123793.

This device is a chair-shaped device in which elastic members are arranged on the seat and backrest, and electro-acoustic transducers such as speakers are connected to the back surfaces of the seat and backrest of the elastic members through diaphragms made of rigid bodies. It is a dish that has been removed.

A person sits on a seat and leans his or her back against the backrest. When an electrical signal containing music or the like is input to an electroacoustic transducer, this electrical signal is converted into acoustic vibrations. This acoustic vibration is transmitted to the human body via the diaphragm and the elastic member. A person sitting on the seat can experience the music directly without hearing it.

[Problem to be solved by the invention] The conventional sensory vibration device described above transmits acoustic vibrations generated by an electroacoustic transducer to the human body via a diaphragm made of a rigid body. In order to increase this, it was necessary to arrange a large number of diaphragms and to attach an electroacoustic transducer to each diaphragm. Additionally, because the diaphragm is difficult to resonate at low frequencies, the bass range lacks impact.

An object of the present invention is to provide a sensory vibration device that solves the above problems.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the bodily sensation vibration device according to the present invention includes forming a high-density layer on the other surface of an elastic member that is subjected to compression by the human body on one surface, A rigid body with grooves is brought into close contact with the high-density layer to form a long space between the high-density layer and the rigid body, and an electroacoustic transducer is further provided to vibrate the air column within this space. be.

[Function] When an electrical signal containing music or the like is input to the electroacoustic transducer, this electrical signal is converted into acoustic vibrations. On this occasion,
The column of air in the long space formed by the groove between the dense layer of resilient member and the rigid body resonates. That is, the sound waves emitted from the electroacoustic transducer are reflected by the rigid body and the high-density layer of elastic members with high acoustic impedance, generating standing waves in the air column. However, since the high-density layer has a smaller acoustic impedance than the rigid body, a portion of the sound waves pass through the high-density layer and proceed within the elastic member. Therefore, acoustic vibrations are transmitted to the human body comfortably held by the elastic member.

Embodiment FIG. 1 is an exploded perspective view of a bodily sensation vibration device according to an embodiment of the present invention.

The present invention can be applied to a sensory vibration device having any external shape, and can also adopt the shape of a cushion, for example, but a chair-shaped case will be described here.

A support part 2 made of a rigid body such as a plastic plate is attached to the upper end of the leg 4. The support part 2 includes a substantially horizontal seat part 6,
It consists of a backrest part 8 extending upward from the rear end of the seat part 6, and is slightly curved to accommodate the human body. A groove 10 is formed in the front surface of the support part 2. This groove 10 is bent into a U-shape at the seat portion 6 and then reaches the backrest portion 8.
Similarly, the backrest portion 8 is sequentially bent into a U-shape, and then reaches the seat portion 6 again, where it is further bent into a U-shape. As described above, the grooves 10 are formed in series over the entire front surface of the support portion 2 so as to be sequentially bent into a U-shape. Groove 1
The starting end and ending end of 0 are both located at the rear of the seat portion 6.

From both ends of the groove 10, short pipes 12, 14 rise along the groove 10. These pipes 1.2
, 1.4 are connected to an acoustic box 20 having an electroacoustic transducer inside.

A cushion material 24 is bonded to the front surface of the support portion 2. This cushion material 24 is a resilient member made of urethane foam. This is bent into substantially the same shape as the seat part 6 and the backrest part 8 of the support part 2 to form the seat part 26 and the backrest part 28, and then is brought into close contact so as to cover the front surface of the support part 2.

FIG. 2 is a longitudinal sectional view of the cushion lug 24.

As shown in the figure, a recess 34 is provided on the lower surface of the seat portion 26, and when bonding the cushion material 24 to the support portion 2,
The acoustic box 20 on the support 2 fits exactly into the recess 34.

The cushioning material 24 consists of two layers: a thick low-density layer 30 on the front surface and a thin high-density layer 32 on the rear surface. Both layers 30, 32 can be formed simultaneously during urethane foaming.

That is, the high-density layer 32 that is naturally formed on the contact surface with the foaming jig can be used. Alternatively, the inner surface of the foaming jig may be coated with paint in advance, then urethane may be foamed, and a high-density coating film may be transferred to the urethane foam. At this time, if a urethane paint is used, the low density layer 30
Since the high-density layer 32 and the like are of the same quality, it is easy to release the mold. Note that the high-density layer 32 may be formed by bonding a face material made of high-density resin to the back surface of the low-density layer 30. The low density layer 30 is
For example, it is a soft urethane foam having an open cell structure.

However, the materials of the low-density layer 30 and the high-density layer 32 are not limited to the urethane described above.

FIG. 3 is an enlarged cross-sectional view of the acoustic box 20.

As shown in the figure, the inside of the housing 42 is partitioned into a front chamber 46 and a rear chamber 48 by a partition plate 44.

An opening 50 is provided in the partition plate 44, and a speaker 52, which is an electroacoustic transducer, is mounted so as to face the front chamber 46 through this opening 50. This speaker 52 has a lead wire 54 for inputting an electrical signal containing music or the like. The front chamber 46 and the rear chamber 48 each have a pipe 5[
i, 58 to each pipe 12.14 of said support 2.

FIG. 4 is an enlarged cross-sectional view of the backrest portion in a state where the support portion 2 and the cushion material 24 are assembled.

A space 60 is formed between the support part 2 and the high-density layer 32 by the close contact between the backrest part 8 of the support part 2 in which the groove 10 is formed and the high-density layer 32 of the backrest part 28 of the cushion material 24 . This space 60 is an elongated space that emanates from the acoustic box 20 and enters this box again. The air column within the space 60 is made to vibrate by the speaker 52 within the acoustic box 20.

Although the groove 10 shown in the figure has a semicircular cross section, its shape may be arbitrary. For example, by making this cross-sectional shape flat, the thickness of the support portion 2 can be reduced.

A person sits on the seat part 26 of the cushion material 24 and leans his or her back against the backrest part 28. At this time, the low-density layer 30 of the cushioning material 24 is pressed against the front surface and deforms, and its elasticity holds the human body.

When an electrical signal is input to the speaker 52 through the lead wire 54, this electrical signal is converted into acoustic vibration. On this occasion,
The space 60 is passed through the pipe 56 via the front chamber 46 provided in front of the speaker 52 in the acoustic box 2o.
Sound waves are emitted within.

The sound waves radiated into the space 60 propagate in the longitudinal direction within the space 60 while being reflected by the support portion 2 having a large acoustic impedance and the high-density layer 32, and return to the acoustic box 2.
It reaches within 0. The sound waves propagated within the acoustic box 2° are guided into the rear chamber 48 through the pipe 58, that is, to the rear of the speaker 52. The sound waves guided into the rear chamber 48 are reflected by the inner wall of this chamber, and together with the sound waves radiated rearward from the speaker 52, are guided back into the space 6o through the pipe 58. Therefore, a standing wave is formed within the space 6o, and the air column within this space 60 resonates. However, since the high-density layer 32 of the cushioning material 24 has a smaller acoustic impedance than the support portion 2 made of a rigid body, the high-density layer 32
vibrates, and a part of the sound wave passes through this high-density layer 32 and advances into the low-density layer 3o. Therefore, cushion material 2
Acoustic vibrations are transmitted to the human body held at 4. therefore,
A person sitting on this sensory vibration device can experience music directly, not just through his ears. However, because the air column, which is a resonator, is long, sounds in the low frequency range resonate well, so you can enjoy music with powerful deep bass.

In addition, a space 60 for resonance is provided on the entire front surface of the support part 2.
Since it is bent into a letter shape, the area where you can experience sound and vibration is large. Furthermore, since the front and rear surfaces of the speaker 52 are communicated through the space 6o, the sound pressure generated by the speaker 52 can be effectively utilized.

Note that speakers may be provided at both ends of the space 60, respectively. Further, one end of the space 6o may be closed, for example, by a portion of the pipe 14. An opening whose opening degree can be adjusted may be provided in either one of the pipes 50 and 58. By providing such an opening, it is possible to adjust the magnitude of the bodily vibration. Furthermore, the volume of sound that enters the ear through this opening can also be adjusted.

[Effects of the Invention] As explained above, the sensory vibration device according to the present invention has the following effects:
A high-density layer is formed on the other side of an elastic member that is compressed by the human body on one side, and a rigid body with grooves is brought into close contact with the high-density layer to form a long space between the high-density layer and this rigid body. However, since it is equipped with an electroacoustic transducer that vibrates the air column within this space, there is a large degree of freedom in arranging the space for resonance. Therefore, it is possible to efficiently experience acoustic vibrations using at least one electroacoustic transducer, regardless of the external shape of the sensory vibration device. Furthermore, if the number of electroacoustic transducers is at least as large as possible, the acoustic vibration sensing area can be increased.

What's more, even though it uses the resonance of long air columns, it has a powerful bass range, making it possible to transmit heavy bass tones in music with high efficiency. Therefore, the dimensions of the electrical sound transducer may be small.

[Brief explanation of the drawing]

1 is an exploded perspective view of a sensory vibration device according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the cushion material of the sensory vibration device shown in the previous figure, and FIG. 3 is a sensory vibration device shown in FIG. 1. FIG. 4 is an enlarged cross-sectional view of the backrest portion of the sensory vibration device of FIG. 1. Explanation of symbols 2...Support part, lO...Groove, 20...Acoustic box, 24...Cushion material, 30...Low density layer, 3
2... High-density layer, 52... Speaker, 60... Space. Patent applicant: Toyo Tire & Rubber Industries Co., Ltd. Agent Patent attorney: Tsuta 1) Shoko et al. Amendment 0.5, May 11, 1986 Director General of the Patent Office Kunio Ogawa 1, Indication of the case 1988 Patent Application No. 906! 55 No. 2, Name of the invention Sensory vibration device 3, Relationship with the person making the amendment Patent applicant No. 17-18 Edobori 1-chome, Nishi-ku, Osaka (314) Toyo Rubber Industries Co., Ltd. Representative Hideo Matsushita 4, Agent Address: 541 2-9' Kawaramachi, Higashi-ku, Osaka, 8th floor, 5th floor, Harada Building, date of amendment order: 1920, month, day, spontaneous 6, subject of amendment: Drawing.

Claims (1)

[Claims] 1. A high-density layer is formed on the other surface of an elastic member that receives pressure from a human body on one surface, and a rigid body with grooves is brought into close contact with the high-density layer to form a long space between the high-density layer and this rigid body. What is claimed is: 1. A sensory vibration device comprising an electroacoustic transducer that vibrates an air column within the space.